For FIA approval the shoulder straps must be 3 inches wide except for HANS Use Only harnesses where a 3" to 2" shoulder strap is allowed. If the HANS Use Only straps are used then a HANS device must be worn to comply with the FIA regulations.

For FIA approval the lap straps can be either 2 inches or 3 inches wide according to driver preference.

Crutch straps are 2" wide. Single Seater style Loop and D crutch straps have a 1" loop on the end of the 2" webbing to thread through the D rings.